*{
    margin: 0;
    padding: 0;
}
.shouyue{
    text-align: center;
    background-color: #4caf50;
    position: fixed;
    width: 100%;
    height: 150px;
    color: white;
    z-index: 99;
}
.shouyue p{
    margin-top: 20px;
}
.daohanglan{
    text-align: center;
    background-color: black;
    color:white;
    position: relative;
    top: 150px;
    width: 100%;
    margin-left: 0px;
    height: 50px;
    z-index: 98;

}
.daohanglan span{
    line-height: 50px;
}
.zongti{
    width: 95%;
    margin: auto;
}
.jieshao{
    position:relative;
    top: 200px;
}
.jieshao h2{
    color: #4caf50;
    margin-top: 20px;
}
.jieshao p{
    margin-top: 20px;
}
.jieshao img{
    width: 10%;
}
ol li{
    list-style-position: inside;
}
.biaoge{
    width: 100%;
    text-align: center;
    margin-bottom: 10%;
    margin-bottom: 18%;
}
.weiye{
    text-align: center;
    background-color: #4caf50;
    position: fixed;
    bottom: 0;
    width: 100%;
    color: white;
    z-index: 99;
}
.weiye p{
    margin-top: 10px;
}